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Old 1st July 2013, 05:41 PM   #351
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They have enough brain to collect some money.....
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Old 1st July 2013, 05:43 PM   #352
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I even had a patent on that setup...
but i went much further...

google " Gekreuzte Schallwand "
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Old 1st July 2013, 05:56 PM   #353
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Gekreuzte Schallwand - Dokument DE102008016703A1

when you study this more carefully you will see that i even patented the " Phanton Source"

I should be rich by now. Many speakers produce phantom sources.
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Old 28th July 2013, 06:24 AM   #354
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This is an interesting site :
retro vintage modern hi-fi: Spherovox - Corner Folded Horn
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Old 29th July 2013, 01:08 PM   #355
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Hi Jochim . I noticed in item 23 the test unit was high up and I suspect offset a little . Sorry I have not followed all the thread so I am asking you to repeat yourself . Could it begin to work so high up ( 80 Hz ) . I will be doing this with a pair of Eminence 12LTA soon and couldn't beleive I might be doing the right thing . I notice you don't extend the back too far ( later on ) . I was thinking about 10 cm ( 1220 x 606 panel ) .

Nigel
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Old 31st July 2013, 07:37 PM   #356
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expose 3D printed desktop speakers by simon ellison
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Old 31st July 2013, 07:43 PM   #357
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That is an Enviee in a 1.2m x 1.2m baffle. It is offset to linearize the frequency response.
In that baffle it goes to ca. 100Hz -3dB and i use an active M-Dipole sub.
Later i made the baffle only 60cm wide. In that case i use a double layer of acoustic foam in the back so that is more a cardioid.
I called that resistive baffle and it also works down to 100Hz and is only half as wide.
If you want to make a dipole woofer in a baffle with your Emminence i would put the woofer close to the floor. There was a Martin King design that way.
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Old 31st July 2013, 07:45 PM   #358
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Here you go....
http://www.quarter-wave.com/OBs/OB_Design.pdf
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Old 31st July 2013, 08:21 PM   #359
RCruz is offline RCruz  Switzerland
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Quote:
Originally Posted by Joachim Gerhard View Post
Another cool link... thanks
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Old 27th August 2013, 06:47 PM   #360
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Acoustical Society of America - 161st Lay Language Papers
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